Z03.6 — Encounter for observation for suspected toxic effect from ingested substance ruled out
Is Z03.6 billable?
Yes — Z03.6 is billable for FY2027. Z03.6 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z03.6 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Z03.6 at a glance
| Code | Z03.6 |
|---|---|
| Description | Encounter for observation for suspected toxic effect from ingested substance ruled out |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does Z03.6 group to?
Z03.6 sits in MDC 23 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 951Other Factors Influencing Health Statusmedical
How is Z03.6 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z03.6. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Observation › adverse effect of drug (following) (for) (without need for further medical care)
- Observation › toxic effects from ingested substance (following) (for) (without need for further medical care)
- Self-poisoning › observation followingattempt
- Observation › suicide attempt, alleged NEC › self-poisoning (following) (for) (without need for further medical care)
- Observation › suspected, ruled out › drug poisoning or adverse effect (following) (for) (without need for further medical care)
- Observation › suspected, ruled out › toxic effects from ingested substance (following) (for) (without need for further medical care)
- Observation › suspected, ruled out › suicide attempt, alleged › self-poisoning (following) (for) (without need for further medical care)
Inclusion terms
Alternative wording in documentation that is classified to Z03.6.
- Encounter for observation for suspected adverse effect from drug
- Encounter for observation for suspected poisoning
Excludes1 — never code together — inherited from Z03
The conditions below can never be reported together with Z03.6 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Z00-Z13
The conditions below are not part of Z03.6, but a patient may have both at the same time. When documentation supports it, Z03.6 and the excluded code may both be reported.
How long has Z03.6 existed?
Z03.6 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.